Brake.



H. VANDERBEEK.

BRAKE. H APPLICATION FILED OUT. 14, 1909.

'Patamtea may 3mm.

"broke, the drum being retained in place HERBERT VANDERBEEK,

OF BRIDGEPORT, CONNECTICUT, ASSIGNOR, BY MESNE AS SIG'NMENTS, TO THE ROYAL EQUIPMENT COMPANY; OF BRIDGEPORT, CONNECTICUT,

A GORIPORATION OF CONNECTICUT.

BRAKE.

Specification of Letters Patent.

Patented lllliiy iv, ieio.

Application filed October 14, 1909. Serial No. 522,630.

To all whom may concern:

Be it known that l, l-lniusnn'rVnnonunnnn, a citizen oi the United States, residing at Bridgeport, county of Fuirlield, State of Connecticut, have invented an Improve merit in Brakes, of which the following is u specification.

This invention has for its object to provide s broke suitable for machinery or vchicles, in which the braking effect will be relatively large compared with the operating force and in which the effect will be equally eflicient in both directions of I'Otiltion oi the drum. To accomplish this rvsuit I take advantage of the well known wrapping or winding etlect of a flexihle hand surrounding and in contact with a rotating drum, one end of said l and being fixed while the operating .torce is applied to the other end in the direction of rotation of the drum; and in order to gain this of- :Eect in hoth directions of rotation I have provided means by which either end of the hand automatically becomes the fixed end, depending upon the direction of rotation of the drum.

In the accompanying drawing forming 2; part of this specification, in which similar reference characters indicate the some parts in all the views, Figure l is a plan view illustrating the setting mechanism of my novel omitted; Fig. 2 a, side elevation of the brake complete; Figs. 3 and 1 are detail views illustrating modifications inthe details of construction.

10 denotes the brake drum, 11 the brake band, 12 the brake pad and 13 a fixed arm or .support extending from the framework (not shown). The brake pad lies in proximity tothe drum and is secured to and by the hand. The left end of the lorokelosnd, as shown in the drawing, is connected to s stud 16 having a transverse hole for a purpose presently to be ex plained. l n the present instance the hand. is shown as curved over backward and rivoted to itself to form eyes 14, there being on opening 15 between the eyes correspond ing with the hole in the stud. Support 13 is also provided withn transverse hole in olinement with the hole in the stud.

The

I l i i I a carry it slightly in the right end of the brake band, as} shown in the drawing, is connected to a stud 20. In the present instance the band is shown as curved over backward and riveted to itself to form eyes 17, four in number. Between the two central eyes is an opening 18 and between the two central eyes and the two end eyes are openings 19. I

21 denotes znnoperating lever pivoted 0n stud 20 between the central eyes 17, and 22 denotes link plates the respective ends of which areloosely honnected to support 13 and to stud 20 between the central'und end eyes 17, as clearly shown in Fig. 1;

23 denotes an adjusting bolt which passes through the transverse holes in support 13 and stud 16, is provided with a yoke 24 by means of which it is pivoted to the operating lever, with a shoulder 25 or an en gaging wall 32 adopted to engage the support, for n purpose presently to be explained, and the other end of which is provided with on adjusting nut 26 having on its in nor face a collar 27 which lies in opening 15 and is adapted to bear against stud 16. The function of this adjusting bolt and ad justing up the wear of the brake padso as to insure close contact at all times of the brake pad with the drum.

It is of course well understood that. in brakes of this character the action of the 0pernting lever is to set the brake, and that the first eil'ect of the operation of the lever is to cause the drum to pick up the brake pad and direction of its movement, the braking action being produced by the close wrapping of the brake pad about the drum. In order to insure equally perfect action of the brake when the drum is turning either forward or backward, it is necessary to provide for longitlulimll movement of both the link plates and the adjusting screw so that, the fixed point of support of the brake hand will automatically shift from one end of the band to the other. lVhen the drum is turning forward and the brake is applied, the link plates become holding members. The right ends of the link plates engage support 13 and stud 20 engages the left end of the. link plates. the brake being nut is to provide :1 means for taking set by pull upon the left end of the band. \Vhen the drum is turning backward and the brake is applied the adjusting screw becomes the holding member through the engagement of shoulder 25 with the support, the brake being set by pull upon the right end of the band. ment of the link plates in l. raking when the drum is turning forward may be provided for by means of slots 28 through which support 13 passes as in Fig. 52', or by means of slots 29 through which stud 20 passes as in Figs. 3 and 4. In the latter form, slots 19 in the end of the brake band are elongated so to permit movement 01'' the link plates.

The necessary longitudinal movement of the adjusting bolt in braking when the drum is turning backwtird may be provided for either as in Fig. 2 or in Fig. 8. In Fig. the adjusting bolt slides t'reely through the transverse hole in support 18 until shoulder 25 engages the support. .ln the torn'i illustrated in Fig. the adjusting bolt is shown as provided with a central enlargement 30 having a slot 31 through which the support passes, the right end of the slot, as seen in Fig. 3, comprisinga wall which engages the support and holds the adjusting screw against further movement.

The operation is as follows: When the upper end of the operating lever as seen in Fig. 2 is moved toward the right, the tirst eti'ect is to draw the ends ol the brake band and brake pad toward each otherand to close the brake. pad about the drum. An instant later the brake pad is picked up by the drum and carried slightly in the direction of its rotation. It the drum is turning forward,

that is. toward the right as seen in the draw-.

ing, the pad will be carried by the drum uir til the left ends of the link plates engage the support, as in Fig. 2, or until studs :20 en gage the right end ot slots 25), as in l igs. 3 and 4. Either of these engagements stops further movement of the brake band and brake pad and ea uses the pad to wraptightly about the drum and thus secure themostperfeet frictional braking action possible, the pull being entirely upon the support. Suppose now that the drum is rotating backward, that is toward the hell as seen in the drawing, and that the brake is set by means of the operating lever. The first effect is to draw the ends of the brake band and brake pad toward each other as before and to close the brake pad about the drum. An instant later the brake pad is picked up by the drum as before and carried backward until shoulder 25 on the adjusting bolt engages the sup port, as in Fig. 2. or until wall 32 at the right end of slot. 31 engages the support as in Fig. Either 0]. these engagements stops further movement of the brake band and The necessary longitudinal move brake pad and causes the pad to Wrap tightly about the drum and thus secure the most perfect frictional braking action possible, the pull being entirely upon the support.

Having thus described my invention I claim 1. An improved brake comprising a support, a brake band adapted to engage a 1'0- tary drum, longitudinally movable link plates pivotally connected with one end of said brake band and connecting the latter with said support, an operating lever pivotally connected with said band at the point of pivotal connection of said link plates, and an adjusting bolt having its ends directly connected with the other end of said brake band and with said lever, respectively, the shank of said bolt being provided with means for engaging said support to limit its movement.

2. As an improvement in brakes, a support, a brake band adapted to engage a 1'0- tary drum, a stud carried by one end of said band, an operating lever pivotally mounted on said stud, longitudinally movable link plates connecting said stud and said support, and an adjusting bolt directly connecting the other end of said band with said lever and nu able with relation to said support, the shank of said bolt provided with means for engaging said support to limit the movement of the bolt.

:3. A brake comprising a rotary drum, a. brake band inclosing the drum, an operating lever connected to one end of the band, a support having a transverse hole, a longitudinally movable adjusting bolt which passes through the hole, is connected to the other end of the band and to the lever and is provided with a shoulder adapted to engage the v upport to limit. the movement of the band when the drum is turned backi'ard and longitudinally movable link plates between the support and the end of the band that is connected to the lever.

4. A brake comprising a band having eyes at. one end with an opening between them, a stud in said eyes having a transverse hole, a support also having a transverse hole, an operating lever connected to one end of the band, an adjusting bolt connected to the lever, passing through the support and the stud and having a shoulder adapted to engage the support, a nut on said bolt having a collar lying in the opening between said eyes and engaging the stud, and slotted link plates between the support and the end of the band to which the lever is pivoted.

5. As an improvement in brakes, a support, a brake band adapted to engage a rotary drum, a stud carried by one end of said band, an operating lever pivotally mounted on said' stud, l ngiiiulinally movable link eess,44e 3 plates connecting said stud and said sup- In testimony whereof I afiix my signature port, and a longitudinally movable adjusting in presence of two Witnesses. bolt connecting the other end of said band with said lever, the shank of said bolt being HERBERT VA'l-DERBEEK' 5 provided with :1 shoulder adapted to engage 'Witnesses:

said support to limit said longitudinal move- EDWIN B. KNOWLEs,

mer t. A. M. Woosruu; 

